vim_buffer_switch · Mcp Neovim Server MCP: Risk & Policy

WHAT IT DOES

What vim_buffer_switch does on Mcp Neovim Server

AI agents invoke vim_buffer_switch to trigger actions in Mcp Neovim Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why vim_buffer_switch needs a policy

Switching buffers is an interactive editor operation that changes the active state of the Neovim editor. While it doesn't directly modify file content, it triggers an external application state change (the active buffer in Neovim), making it an Execute-category action. Misuse could disrupt the editing session or cause unintended content to be displayed/acted upon, warranting medium severity.

From the tool's definition Switch between buffers by name or number

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vim_buffer_switch Rate-limited

vim_buffer_switch stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vim_buffer_switch": {
      "limits": [
        {
          "counter": "vim_buffer_switch_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Neovim Server, so you can run agents against it safely.

FAQ

Questions about vim_buffer_switch

What does the vim_buffer_switch tool do? +

Switch between buffers by name or number. It is categorised as a Execute tool in the Mcp Neovim Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vim_buffer_switch? +

Register the Mcp Neovim Server MCP server in PolicyLayer and add a rule for vim_buffer_switch: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Neovim Server. Nothing to install.

What risk level is vim_buffer_switch? +

vim_buffer_switch is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit vim_buffer_switch? +

Yes. Add a rate_limit block to the vim_buffer_switch rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block vim_buffer_switch completely? +

Set action: deny in the PolicyLayer policy for vim_buffer_switch. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides vim_buffer_switch? +

vim_buffer_switch is provided by the Mcp Neovim Server MCP server (mcp-neovim-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.